The late great Amy Winehouse famously wrote a song called “(F–k Me) Pumps”, about the sexy shoes women wear out to fancy clubs. But now designer Christian Louboutin took it one step further with a line of kicks emblazoned with the word “SEX”! The shoes feature genuine Swarovski crystals, and at $1,400 a pair, they don’t come cheap. But the high price tag hasn’t made them any less popular with style conscious (and sexy!) stars. Kate Upton stepped out in her new Loubs at the Jeffrey Fashion Cares benefit in New York City last night, while Katy Perry wore her own pair to the ECHO Awards in Berlin last week. Singer Ashanti was also seen sporting the suggestive shoe at the Falguni & Shane Peacock Fall 2012 fashion show during New York Fashion Week last month. She’s obviously ahead of the curve! Would you want a pair of these NSFW shoes for yourself? Head to the gallery below for a closer look!